Sure product descriptions drive sales, especially when they are strategically optimized for that purpose. Other than that you might as well had left the box empty post your listing with just a picture and wait for nothing to happen. The online marketplace prioritizes conversion rates when it is ranking a product in search. Be strategic about your SEO and Keywords and your product will rank higher than your competitors especially when the conversion rates are higher. And you'll have a much better chance of making it to the phone,tablet or computer screen of your ideal customers every-time. No more praying and hoping that random customers browsing the online marketplace will click "BUY" on your product listing when you're strategically positioned to be exactly what they've been searching for.